HOSIAH is a pottery manufacturer. Past records of his production revealed that 10% of output of coffee mugs were defective in some way and had to be sold off as rejects. HOSIAH has recently introduced some new quality control procedures. In order to assess the effectiveness of these procedures, the line manager takes a random sample of 100 of the coffee mugs and examines them. He finds 7 defectives. Required: On the basis of this evidence alone, has there been a significant improvement in the quality of the coffee mugs? Use the 1% level of significance
HOSIAH is a pottery manufacturer. Past records of his production revealed that 10% of output of coffee mugs were defective in some way and had to be sold off as rejects. HOSIAH has recently introduced some new quality control procedures. In order to assess the effectiveness of these procedures, the line manager takes a random sample of 100 of the coffee mugs and examines them. He finds 7 defectives. Required: On the basis of this evidence alone, has there been a significant improvement in the quality of the coffee mugs? Use the 1% level of significance
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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HOSIAH is a pottery manufacturer. Past records of his production revealed that 10% of output of coffee mugs were defective in some way and had to be sold off as rejects. HOSIAH has recently introduced some new quality control procedures. In order to assess the effectiveness of these procedures, the line manager takes a random sample of 100 of the coffee mugs and examines them. He finds 7 defectives. Required: On the basis of this evidence alone, has there been a significant improvement in the quality of the coffee mugs? Use the 1% level of significance
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